Spraying or squirting process and apparatus therefor



Oct. 27, 1931. A.- KRAUTZBERGER S-PRAYING 0R Squmn'ne PROCESS ANDAPPARATUS THEREFOR Filedv Jan. 25. 1930 2 Sheets-Shea! 1 I v I i-kqmgbeq Oct. 27, 1931. A. KRAUTZBERG EiR 1,829,661

SPRAYIUG QR SQUIRTING PROCESS AND APPARATUS I 'HEREFOR I mm Jan. 25.1930 2 Sheets-sum 2 I lnvenfon kmuf b eqyar Patented Oct. 27, 1931mUTZBmGER, or nonznausmr, mum. nmrzro, GER'EAII'Y srname on saumrmernocnss AND .AJPPARATUS 'rimanron Application filed January 25, 1930,Serial No. 423,440, and in Germany January 10,

The present invention relates to a new spraying or squirting process aswell as new a paratus suitable therefor. -This new invention enables thematerial used to be sprayed '8 or atomized according to new principles."The Words paint or material are used in the vfollowing only as genericnames for all solvent, cleansing and binding media which come-intoconsideration in'the painting or 1 I 10 building arts, which media,under pressure,

are squirted or sprayed in continuous or subdivided streams, either assuch or against one another, and thereby are subdivided; or else theyare sprayed or squirted with the assist- 1 ance of compresed air, steam,or other suitable-compressed gases. This new process is called thecirculation process by the inventor. It opens up new fields of emloyment for the painting and coating-app ances operating with or withoutcompressed air. The spraying apparatus necessary herefor are known underthe name of Sprio, wherefor their working is not further explained here.For carrying out, the present invention anew kind of construction of theapparatus known under the name of Sprio, as well as also of the paintconduit, is necessary, which, according to the invention, is fed b pumpsor other means, so that 39 the paint is rought into circulation in themost serviceable manner and is supplied to the squirtin head. Vesselsmay serve herefor from w ich the paint materials are re-- moved bypressure and are supplied to the -Sprio in the prescribed manner. Thefollowing is attained thereby: (a) The paint atomizing process known perse,which'se'rve's for whitewashing, is im- 0 proved, if line washcompressed e. g. by piston pressure, is supplied to the paint-squirtingnozzels' in the most varied devices (squirting tubes, or the like) Q a(6) Likewise, by the present invention, all spraying and squirtingprocesses are placed on new principles,- according to which.com-

pressed air serves as atomizing agent (e. g.

for lacquers) and n which otherwise, in the alread known manner, thematerial sprays 50 from t e paint nozzles, flows or is pressed out 7 inghead of the Sprio a of these, is taken up by the atomizing air and isscattered.

In all these cases the novelty consists in this capability as well asthe unnecessary appearance of mist and, paint dust connected therewith,is thereby dispensed with and the squirting and spraying capability israised owing to the material being continuously kept hot. The depositionof lime washes and distempers cannot occur. The whole Spri0 7 plant maybe finished out and cleansed when necessary. By suitable adjustment of aregulator the paint circulation proceeds in front of the latterregulator. The Sprioapparatus may thereb be put out of action or may beexchanged by another. Older s ra processes are given completely new eld:of applicationwhich serve in the painting art, forvfilling by squirting,for coating surfaces and so fort The apparatus serving for carrying outthe present invention is shown schematically in" two constructionalforms, .by way of example, in Figures 1-3. Fig. 1 is a side view, I

partly in section, through the squirting apparatus proper (Sprio); Fig.2 is asection through another constructional form of the squirting head-Fig. 3 is a side view, in r tial section, of a completed plant wor onthe circulation process having two Sprios, which enable the processaccordin to the present invention to be carried out.

e praying apparatus (.Sprio) working with or without compressed air ismade up of the main parts 1 and 2, viz. the spraying head, and the bodymember. The latter car m der 1b carries the air tube 12. This is fedfromthe air connection29; it leads the compressed air from the body member 2to the squirting-head member and supplies the air nozzles 13. For thispurpose t e plate is provided with annular chambers 14 or the like. Themain tube 8 also has a bottom 15.

This carries the needle seal, which is not shown, and the idle runningthreaded bush 57 which serves as a connectin member to V m the body 2.The bottom 15 a o carries a guide member 16 for the paint needle. On thebody member 2 there is also a flexible compressed air pipe 5 which, ifnecessary, surrounds the pipe 3; so that when hot air is supplied to theflexible pipe the said hot air warms the pipe and consequently the paintalso. The main tube 8 also has two paint supply tubes 17 18 which,connected by the regulator 6 (w 'ch may also be a multiway cock) form aloop tube. By suitable adjustment of the re later 6 the material to besquirted is led either according to Figure 1 in the direction of thearrows a, or according to Figure 2 in the direction of the arrow 6. v

According to Fi re 2 the paint regulating s indle 19 is guide in thesieve disc 11. Furt er needles 20 may also be provided on the spindle.19, which needles likewise are guided in the disc sieve 11 and servefor closing up other paint squirting nozzles 9. The latter areconstructed according to need and arranged beside the air nozzles 13.For the rest the fittin outof the head member 1 is the same ass own inFigure 1. The main tube 8 may carry paint containers, which areconnected in any way with the tubes 17, 18 (loops) so that the vesselscontainin the material (in-the vertical position) wor according to theflowing system, when they. are arranged'at a suitable height orwork'under pressure.

In any case, with the-described paint conduit 3, 4 (Fig. 3) hot tar, forexample. cannot cool down, either in the conduits 1 7 and 18 or in theregulator 6 or in the Sprio itself; also deposition of lime wash isprevented hereby, as well as stoppages in the nozzles. The direction offlow b is chosen, for exam.- ple, when the Sprio and its aint conduits,as well as the containers for t e material are to be flushed out andthereby cleaned with cleansing agents or solvents, and the flushingliquid 1s led into open vessels, or into such which. are also underpressure, whcrefor (manometer) 26 and a regulating coc 27.

' From the latter the paint (circulated by the pump 21) runs through thesieve 24 back into a container 23. Thus the paint, or the flushin liquidis'continuously maintained in circul ation and cleansed, as well assupplied to the sprayingapparatus (Sprio) for squirting or sprayingpurposes. The paint circulation tubes are surrounding as required b aflexible compressed air tube, which supp es.

compressed air to the flexible tube 28 and to the spraying apparatus(Sprio) ;this revents the heated aint material from so ldi fying duringcol weather and in the course of circulation, whereby the sprayingcapability of the paints (without addition of diluents) is promoted. Theloop tube 3, 4 may be connected at a suitable lace, e. g. at 4a, by

tubes and reversing coc so that then the paint runs in the reverseddirection through the conduits and the Sprio.

Of course the process .here described may be carried out not only withthe apparatus pipes are fed. The feeding back tube 4 for the paint isprovided with a pressure auge.

disclosed in Figs. 1 to 3 as well as in the,

present description, but all details coming within the sco e of theresent invention may be varied as esired; this extends to the fittingout of the Sprio lant and its construction in all mam an subsidiaryparts.

What I claim is: q

1. -A device of the class described comprising a main tube, a sprayinghead fitted in one end thereof, paint supply tubes connected with saidtube, paint conduits communieat ing with the paint supply tubes, acontainer for supplying aint to the conduits and said tubes for circation in the main tube, a pipe surrounding one of the paint conduitsadapted to receive heated air, and a regulator between the paint suppltubes and paint conduits for controlling the circulation of paint throuh the main tube.

2. device of the class described comprising a spraying head including amain tube,

a plate fitted inone end of the tube, said plate havin an annularchamber therein, said plate avmg outlet nozzles communicating with theannular chamber, means for conducting compressed air into thechamber-for discharge from the nozzles, a paint feed nozzle in t eplate, a sieve in the main tube, a

